Have you checked for stored fault codes?
The recent recall for ignition switches has to do with the switch being to easy to accidentally bump it with a knee and knock the key to the off position. BUT, bad ignition switches have cause engines to stall intermittently, i.e. that is NOT what the recall is for, but it is possible it is your problem.
I have seen posts about a TSB/Recall with the earlier Hemi's that there was a problem with the PCM and the connectors, that resulted in intermittent stalling. Do a search for that issue.
Spark Plug and clogged air filters can cause stalling, if you're over due on spark plug changes, you should do it, that could be the problem. As well as the suggestion that the wrong plugs could be in the motor.
The suggestion to check vacuum lines and hoses is good, check the PCV as well, if they malfunction or just get dirty, then can cause too much air flow and be like a vacuum leak.
Also consider if you're using higher than recommended Octane, higher octane fuel has a higher volatility, and doesn't vaporize as easily, especially at cold temperatures. So using higher than needed octane, during cold weather in a cold engine can result in stalling.
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